lr mysql 增删改查_Python对MySQL进行增删查改

#增删查改

from Practice_Recode.UserTest.User importUserimportpymysqldefopenDb():globaldb, cursor

db= pymysql.connect("localhost", "root", "test1234", "pythontest", charset='utf8')

cursor=db.cursor()defcloseDb():

db.close()#按照用户id查询用户记录(输出相应内容，并返回查到的user对象)

defserarchDb(id):

openDb()

sql= "select * from user where id =" +str(id)

rst=cursor.execute(sql)if rst ==0:#print("查找失败")

returnNoneelse:#print("查找成功")

data =cursor.fetchone()#print(data)

user1 = User(data[0], data[1], data[2], int(data[3]), data[4], data[5])returnuser1

closeDb()#按照用户id删除用户记录

defdeleteDb(id):

openDb()

sql= "delete from user where id =" +str(id)

rst=cursor.execute(sql)if rst ==0:print("删除失败")else:print("删除成功")

closeDb()#新增用户

definsertDb(user1):

openDb()

sql= "insert into user values('%d','%s','%s','%d','%s','%s')" %(

user1.id, user1.username, user1.birth_data, user1.money, user1.father, user1.mother)#"INSERT INTO mytb(title,keywd) VALUES('%s','%s')"%(x,y)

cursor.execute(sql)

db.commit()

closeDb()#更新用户信息

defupdateDb(user1):

openDb()

sql= "update user set username = '%s', money='%d' where id='%d'" %(user1.username, user1.money, user1.id)#update user set username='C', money=9999 where id=5;

rst =cursor.execute(sql)if rst ==0:print("更新失败")else:print("更新成功")

closeDb()#测试数据#testuser = serarchDb(5)#testuser.set_username('C')#testuser.set_money(9082)## print(testuser.id, testuser.username, testuser.money, testuser.father, testuser.mother)#updateDb(testuser)

#user1 = User(5, "c", "1111-03-11", 10000, father='A', mother='a')#insertDb(user1)#user2 = User(0, "d", "1111-03-11", 10000, 'A', 'a') # 自增键id设置为0，新增时即可实现自增#insertDb(user2)

#user2 = User(1, "A", "1111-03-11", 10000, father=None, mother=None)#user3 = User(2, "a", "1111-03-11", 10000, father=None, mother=None)#user1 = User(3, "B", "1111-03-11", 10000, user2, user3)#user1.dayin()#user1.father.dayin()

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